Control mechanism



Feb. 27, 1940.

c. PETITJEAN CONTROL MECHANISM Filed Jan. 18, 1938 INVENTOR CLIFFORD0591mm Patented Feb 27, 1940 PATENT"FF1E CONTROL MECHANISBI Uliiiord (lPetitjean, Waterbury, Conn, assignor to The Waterbury Farrel Foundry andMachine Company, Waterbury, Conn, a corporation of ConnecticutApplication January 18, 1938, Serial No. 185,499

30 Claims.

This invention relates to control mechanism, more particularly to thattype of such mechanism as is associated witha ratchet and pawl device orthe like. Such devices are usually constructed with a ratchet wheelfixed on a shaft, a pawl carrier journaled on the same shaft, a pawlmounted in the carrier and suitable mechanism for oscillating thecarrier. During movement of the carrier in one direction the pawlengages a tooth 'on the ratchet wheel and imparts a partial rotationthereto and to the shaft; During the reverse movement oi the pawlcarrier the pawl rides idly over the ratchet teeth. Thus, atpredetermined periods, mov ment is imparted tothe shaft and therethroughto such mechanism, frequently feed rolls or the like, as may beassociated therewith.

When such control mechanism is associated with an upsetting machine,header or the like, the advance of material, such as wire or. the like,by the feed'rolls should be in timed relation with other parts of themachine, such as the cut-off or shearing devices, wherehya full feed ofmaterial, between each successive cut-off or shearing operation, will beassured.

It is desirable during operation, for various reasons, that the feed ofmaterial should be stopped. This is usually accomplished by the manualmanipulation of parts associated with the pawl to move it out ofthe'path of the teeth of the ratchet wheel and-thus. stop movement ofthe feed rolls, hence the feed of material.

Such manual manipulation is had through a part i on the pawl shaft asthe pawl travels in either direction through an arc of a circle.

"If the arc of travel of the pawl ,is relatively slow, for all practicalpurposes, it is possible to manually manipulate the pawl so as to insurea full length feed. However, if such are of travel is rapid, as inmachines operating at a high speed, it is extremely difiicult, in factpractically impossible, to manually manipulate the pawl,

in the above-described manner, to engage and disengage the pawl with theratchet teeth at the proper time and assure a full length feed. A shortfeed of material, among other things, frequently results in the jammingof the short blank in a die or punch. In such case serious damage toother parts of upsetting machine, header or the like, is likely toresult. A principal object of the invention is to obviate thisdifficulty and assure such a proper manual control of the pawl as topositively produce a full length blank. This by means of mechanism,simple in its structure and operation and positive in its results, andwhich may be attached to any machine with the minimum inconvenience.

To these and other ends, this invention'co'ne sists or a controlmechanism, having new and novel features, as is above set forth, andas'will more particularly appear from the following description andaccompanying drawing, wherein like numerals of reference indicate likeparts in the several figures.

For the purpose of illustration only, the invention is disclosed in theaccompanying drawing as being applied to an upsetting machine, header orthe like. j

In the drawing:

Figure 1 represents a fragmentary view of this invention and a portionofan upsetting machine or a header;

Figure 2 is another view thereof;

Figure 8 is an enlarged sectional view thereof, the parts in sectionbeing taken generally upon line 3-.i of Figure 2; and

Figure 4: is an enlarged detailed view of the pawl and some adjacentparts, The numeral It indicates a portion of a conventional type ofupsetting machine, header or the like, having a shaft carrying a crankplate l2 with a T-headed slot i3 in its face,

within which a crank pin I4 is slidably mounted.

feed roll (not shown) and a ratchet wheel Hi.

The above mechanism is well known in the art, and therefore, will not bemore particularly described herein.

Mounted on the shaft rotation, is; a carrier H3, in which is journaled apawl shaft 20 having a pawl ill at one end and a notched collar 22 atthe opposite end. 7

Fixed in any convenient manner to the carrier it is a block. Ed, inwhich a pressure pin 25 having a tapered inner end 26 and an enlargedhead 27 is slidably mounted substantially parallel with the axis of theshaft il'. Also slidaicle in .the block it, at substantially a rightangle'to the pressure pin 2%, is a pawl pin 28,-the 29 of which contactswith a face onthe collar 22, which is one wall of the notch in saidcollar. The inner end of the pawl pin 28 projects in front of thepressure'pin 25 and is engaged by the tapered end it during the inwardmovement thereof.

Slidably mounted on the reduced end 38 of the shaft H, is a sleeve 3ihaving a knurled head 32 and a collar 63, within which is an annulargroove 33. The outward position of this sleeveis determined by anyconvenientineans, The means shown is a screw t lthreaded in the shaft H,the head 35 of which engages a shoulder 36 on the sleeve. The groove 33receives the pressure pin head 21, substantially as shown in n, for freerelative,

head i Figure 3. In this figure, both the pressure pin 25 and the sleeve3! are in their out positions, determined by the adjustable screw 34.When in this out position the tapered end 25 of the pressure pin 25 isout of engagement with the pawl pin 28 and the pawl 25 travels in thepath of the ratchet teeth and when engaged therewith actuates the shaft51 through the ratchet wheel I8.

To move the pawl out of the path of the ratchet teeth, the sleeve 3| ismoved inwardly by manually exerting pressure on the knurled head 32.This causes the pressure pin 25 to slide inwardly and the engagement ofits tapered end 26 with the pawl pin 28 forces the latter outwardly.Pressure is thus applied through the pawl pin to the collar 22, winch,with the pawl shaft 28, is rotated slightly upon its axis, and the pawl2B is thereby moved out of the path of the ratchet teeth. With the pawlin this relative position it travels with the carrier through its. arcof travel without engaging'the ratchet teeth and without impartingmotion to the ratchet wheel or the shaft upon which it is mounted.

The spring fid'between a fixed pin and the collar 22 returns the pawl toits former path when. pressure'of the pawl pin is released so that itwill again be in the path of travel of and engage the ratchet teeth andrestore the feed of material.

It is desirable, although not necessary, that the tapered end 26 be outof engagement with the pawl pin 28 when the pressure pin 25 is in itsout position.

-A detent 37 in a threaded plug ill, the inner end of which is projectedinto an annular groove 38, in the pressure pin 25 by the spring 39,holds the pressure pin against accidental or premature movement. As thedetent 3? has a conical end and the walls of the groove 3% are flaring,manual operation of the sleeve moves the detent outwardly againstpressure of the spring 3!! and permits endwise movement of the pressurepin 25. Similar engagement of the detent 37 with the groove ll assures asimilar holding of the pressure pin 25 against accidental movement whenin its in-position.

As the sleeve 3i is substantially stationary it may be grasped withoutdifficulty by the operator, and through its manipulation he may move thepawl into and out of the path of the ratchet teeth l irrespective of itsspeed of travel.

To assure a positive timing of this control mechanism with other parts,such as the cut-oif or shearing devices, means are provided wherebymovement of the pawl is only possible at predetermined times.

44 fixed thereon, the outer end of the former lever being movable intoand out of the path of movement of the collar 69 on the sleeve 3!.

Journaled on a stud 45,.mounted on a fixed part, is a crank 46, one armof which projects into the path of a cam-piece 58 fixed-on the. crankplate i2 and the other arm is connected with the lever it by the rod 47,having the usual means for adjusting its effective length. The

cam piece 48 is so shaped and positioned in reference to the crank platel2 that the lever #33 during the feed stroke of the carrier it (movingclockwise when viewed as in Figure 2), will project into the groove 33of the collar 39, when in its inward position, and thus prevent pullingout the sleeve 3! and engagement of the pawl with the teeth of theratchet disk 88.

When the arm of the crank 46 rides on the This timing means consists ess'entially of a rock shaft 32 having levers 4-3 and high part of campiece 68, the lever 43 is moved out of the groove 33 and the sleeve 36can then be moved to its out position, thus allowihg the pin 28 to rideoff the conical end of the pressure pin 25 andthe pawl 2i to drop intoengagement with the teeth on the ratchet disk 18. This is possible onlywhen the carrier 19 moves clockwise and insures a full length feed ofmaterial. Consequently, the sleeve 38 cannot be either pushed in todisengage or pulled out to engage.

the pawl 2i with-the ratchet disk l8 when the carrier I9 is movingcouhter-clockwise Thus the sleeve is locked against inward movement bythe lever 43 when the carrier l9 travels counterclockwise. As the teethon the ratchet disk l8 are slightly undercut the pawl is not readilydisengaged from such teeth until the carrier" IE) begins to again moveclockwise.

This invention is not limited to the specific construction, arrangementor form of the parts herein described, as it is capable of numerousmodifications and changes without departing from the-spirit and scope ofthe claims.

What I claim is:

1. In mechanism of the character described; a shaft; a pawl and ratchetmechanism for im parting movement to theshaft; means for moving the pawlinto and out of the. path of the ratchet teeth, including. a memberslidably mounted in a path substantially parallel with the shaft andspaced therefrom; an intermediate member movable at right angles to saidslidably mounted member and disposed between the latter and the pawl andthrough which the pawl is moved about its axis; and a reciprocatingmember for imparting movement to the sliding mem ber.

2. In mechanism of the character described; a shaft; a pawl and ratchetmechanism for imparting movement to the shaft; means for moving the pawlinto and out of the path of the ratchet teeth, comprising in part amanually,

1 parting movement to the shaft; means for moving the pawl into and outof the path of the ratchet teeth,.comprising in part a manually.

controlled reciprocating member with its axis substantially coincidentwith the axis of the shaft; and a longitudinally shiftable memberadjacent to said shaft and substantially parallel therewith that has anoperative connection with the first mentioned member. i

4. In mechanism of the character described; a shaft; a pawl and ratchetmechanism for ime parting movement to the shaft; means for moving thepawl into and out of the path of the ratchet teeth, comprising in part aslidably mounted member that oscillates with the pawl and ratchetmechanism, and having a head thereon; and a second member slidablymounted on the shaft and having an operativeconnection with the firstmentioned member through the said head.

5. In mechanism of the character described; a A shaft; a pawl andratchet mechanism for imparting movement to the shaft; means for movingthe pawl into and out of the path of the ratchet teeth, comprising inpart a manually controlled member slidably mounted on said shaft; and asecond member spaced from'the shaft'tha t oscil- Git lates with the pawland ratchet mechanism, and having a part thereon that projects-into agroove in the first mentioned member.

6. In mechanism of the character described; a shaft; a pawl and ratchetmechanism for impartingmovement to the shaft; means for-moving the pawlinto and out of the path of the ratchet teeth, comprising in part amanually controlled member movable with its axis substantiallycoincident with the axis of the shaft; a second memberslidably mountedadjacent to said shaft and having ,an operative connection with thefirst mentioned member; and a pin movable in a path at anangle to saidshaft and projecting into the path of movement of the last mentionedmember.

, 7 In mechanism of the character described;,a shaft; a pawl and ratchetmechanism for imparting movement to the shaft; means for moving the pawlinto and out of the path of the ratchet teeth, comprising in part amanually controlled member with its axis substantially coincident withthe axis of the shaft and movable substantially parallel with said axis;and a reciprocating second member, slidably mounted adjacent to saidshaft and having an operative connection'at its inner end with the firstmentioned member.

8. In mechanism of the character described; a shaft; a pawl and ratchetmechanism for imparting movement to the shaft; means for moving the pawlinto and out of the path of the ratchet teeth, comprising in partamanually controlled member movable with its axis substantiallycoincident with the axis of the shaft; a secondmem ber slidably mountedadjacent to said shaft and having an operative connection with the firstmentioned member; and means holding said sec-- ond member againstaccidental movement when in one or more of itspositions.

9. In mechanism of the character described; a shaft; a ratchet wheelthereon; an oscillating carrier on the shaft; a pawl mounted in thecarrier; means for actuating the pawl relative to the carrier, wherebyit is moved into and out of the path of the ratchet teeth, comprising inpart an element'mounted in the carrier and having engagement with a partfixed to the pawl; a pressure member mounted so as to oscillate with thecarrier and move independently thereof; and a -member slidable axiallyon the shaft having an I a. shaft; a pawl and ratchet mechanism forimparting movement to the shaft; means for moving the pawl into and outof the path of the ratchet teeth, the axis of a portion of said meansbeing substantially coincident with the axis of the shaft; and means forpreventing the move- 7 merit of said means except when the pawl andratchet mechanism is in a predetermined relative position. r

11. In mechanism of the character described; a shaft; a pawl and ratchetmechanism for im-,

parting movement to the shaft; means for moving the pawl into and out ofthe path of the 12. In combination with a shaft; a ratchet wheelthereon; a carrier movable on the shaft; a pawl journaled in thecarrier; and means for moving the pawl into and out of thepath of theteeth of the ratchet Wheel, a portion of said means being slidableaxially on the carrier and another portion upon a part independentthereof and slidable substantially parallel therewith.

13. In combination with a shaft; a ratchet wheel thereon; a carriermovable on the shaft; a pawl journaled in the carrier; and means formoving the pawl into and out of the path of the teeth of the ratchetwheel, a portion of said means being movable on the carrier andanotherportion upon a part independent thereof and slidablesubstantially parallel therewith and having an operative connection withsaid first mentioned portion.

14. In combination with a shaft; a ratchet Wheel thereon; a carriermovable on the shaft; a

pawl journaled in the carrier; means for mov- 15. In combination with ashaft; a ratchet wheel thereon; a carrier movable on the shaft; a pawljournaled in the carrier; a collar associated with the pawl; a membermovable in anclwith the'carrier, having contact with said collar; asecond member having engagement with said member and movable on and withthe carrier at an angle to said member; and a sleeve or the like havingan operative connection with the last mentioned member and slidablymounted on the shaft.

16. In combination with a shaft; a ratchet wheel thereon; a carriermovable on the shaft; a pawl journaled in the carrier; and means formoving the pawl into and out of the path o-fthe teeth of the ratchetwheel, comprising in part companion members movable on and with thecarrier at an angle to each other one member being substantiallyparallel with the shaft and spaced therefrom; andan independent membermovably mounted on the shaft and through which the companion members areactuated and the pawl caused to move in the carrier away from the teethof the ratchet wheel. I

17. In mechanism of the'character described; a shaft; a pawl and ratchetmechanism for imparting an intermittent movement to the shaft; and meansoperative only after the completion of such intermittent movements tomove the pawl out of the path of the ratchet teeth; and positivelycontrolled means to prevent actuation of such pawl moving means duringthe movement of the shaft.

18. In mechanism of the character described; a shaft; a pawl andratchet'mechanism for imparting an intermittent movement to the shaft;means whereby the pawl may be lifted out of the path of the ratchetteeth between said intermittent movements; and means movable into andout of the path of said means for locking the lifting means againstmovementexcept at predetermined times. 19. In mechanism of thecharacterdescribed; a pawl and. ratchet mechanism for imparting movementto the shaft; means for moving the pawl into and out of the path of theratchet teeth, comprising in part, a member movable on the shaft; andmeans movable into the path of said member to prevent movement thereofwhen the pawl and ratchet mechanism is in a predetermined relativeposition.

20. In combination with a shaft; a ratchet Wheel thereon; a carriermovable on the shaft; a pawl journaled in the carrier; a member movablein and with the carrier for imparting independent movement to the pawl;a second member movable on and with the carrier, having engagement withthe first mentioned member; a sleeve or the like, having an operativeconnection with the last mentioned member and slidably mounted on theshaft; and means movable into the path of the sleeve to prevent movementthereof when the ratchet and pawl mechanism is in a predeterminedrelative position.

21. In combination with a shaft; a ratchet wheel thereon; a carriermovable on the shaft; a pawl journaled in the carrier; a member movablein andwith the carrier for imparting independent movement to the pawl; asecond member movable on and withthe carrier, having engagement with thefirst mentioned member; a sleeve or the like, having an operativeconnection with the last mentioned member and slidably mounted on theshaft; means for actuating the carrier from a rotary part; and othermeans, deriving its motion from a rotary part for preventing movement ofthe sleeve except when the pawl and ratchet mechanism is in apredetermined relative position.

22. In combination with a shaft; a ratchet wheel thereon; an oscillatingcarrier on the shaft; a pawl mounted in the carrier; a member mounted inand movable with the carrier for imparting independent movement to thepawl; a second member movable on and with the carrier, having engagementwith the first mentioned member; a sleeve or the like, having anoperative connection with the last mentioned member and slidably mountedon the shaft; means for actuating the carrier from a rotary part; andother means deriving its movement from a rotary part for preventingmovement of the sleeve except when the pawl and ratchet mechanism is ina predetermined relative position.

23. In combination with a shaft; a ratchet wheel thereon; an oscillatingcarrier .on the shaft; a pawl mounted in the carrier; a member mountedin and movable with the carrier for imparting independent movement tothe pawl; a second member movable on and with the carrier, havingengagement with the first mentioned member; a sleeve or the like, havingan operative connection with the last mentioned member and slidablymounted on the shaft; means for actuating the carrier from a rotarypart; and cam actuated means for preventing movement of the sleeveexcept when the pawl and ratchet mechanism is in a predeterminedrelative position.

24.-In combination with a shaft; a ratchet wheel thereon; an oscillatingcarrier on the shaft; a pawl mounted in the carrier; a member mounted inand movable with the carrier for imparting independent movement to thepawl; a second member movable on and with the carrier, having engagementwith the first mentioned member; a sleeve or the like having anoperative connection with the last mentioned member and slidably mountedon the shaft; means for actuating the carrier; a member, which in one of"its positions is in the path of the sleeve and permits movementthereof; and cam means for actuating the member.

25. In mechanism of the character described; a pawl and ratchetmechanism for imparting movement to the shaft; means for moving the pawlinto and out of the path of a the ratchet teeth, comprising in part, amember movable on the shaft; and cam actuated means movable into thepath of said member to prevent movement thereof when the pawl andratchet mechanism is in apredetermined relative position.

26. In mechanism of the character described; a shaft; a pawl and ratchetmechanism for imparting movement to the shaft; means for-mow ing thepawl into and out of the path ofthe ratchet wheel, comprising in part,companion members, one member being manually actuated substantiallyparallel with the shaft and imparting movement to the other member; andinter- 1 mediate mechanism between the latter 1 of said members and thepawl. I

27. In mechanism of the character described; a shaft; a pawl and ratchetmechanism forimparting movement to the shaft; means for'moving the pawlinto and out of the pathof the ratchet wheel, comprising in partcompanion members, means to mount saidmembers forbodily slidingmovements in spaced but substantially parallel planes, one operated bythe movement of the other; and intermediate mechanism'between one ofsaid members and said pawl, for imparting movement to the latter.

28. In mechanism of the character described; a shaft; a pawl and ratchetmechanism for imparting movement to the shaft; means for mov-f ing thepawl into and out of the path of the ratchet wheel, comprising in partcompanion members, one operated by the movement of the other; andintermediate mechanism between onev of said members and said pawl, oneof said companion members being mounted substantially concentric withthe shaft, and the other on a part that oscillates in relation tosaid-shaft.

29. In mechanism of the character described; a shaft; a pawl and ratchetmechanism for imparting movement to the shaft; means for moving thepawlinto and out of the path of the ratchet wheel, comprising in partcompanion members having an int'erme'shing engagement members, oneoperated by the movement of the other, intermediate mechanism betweenoneof said members and pawl for imparting movement to the latter, andmeans movable into and out of the path of one of said members. to permitmovement thereof when the pawl and ratchet mechanism is in predeterminedpositions I CLIFFORD o. PEITrJEAn.

